About The I/Q Signals; D General Description; D I/Q Data Format - Icom IC-7610 Reference Manual

I/Q SIGNAL

■ About the I/Q signals

D General description

I/Q data is output from the [USB 2] port on the IC-7610.
One endpoint is reserved to receive I/Q signals.
Address
(Hexadecimal)
I/Q data
IC-7610 → PC
The sampling frequency, Bit depth and I/Q signal bandwidth are fixed as follows.
Sampling frequency
1.92 MHz
TIP:
The sampling frequency can be set to 960 kHz or less in the HDSDR application.
You can select the Bit depth in the HDSDR application.
These are achieved by processing down sampling and bit conversion on the PC.

D I/Q data format

Data format:
The I/Q data is composed of 2 parts: "I" signals and "Q" signals.
Each data length is: "I" =16 bits (2 Bytes), "Q" =16 bits (2 Bytes).
(The byte order is in the little-endian format.)
I I Q Q
2 bytes 2 bytes
• I/Q data range is "–32768 (0x8000) ~ +32767 (0x7FFF)."
• I/Q data is formed in increments of 4 bytes. Therefore the most significant byte must be an I signal.
Endpoint Number
Direction
(Hexadecimal)
84 IN
Bit
Signal Bandwidth
depth
16-bit 1.66 MHz
...
I I Q Q
2 bytes 2 bytes
Transfer Type
04 Bulk transfer
Band (Main/Sub)
Main or Sub
(Selectable)
5